CN220138617U - Lithium battery pole piece connection structure - Google Patents
Lithium battery pole piece connection structure Download PDFInfo
- Publication number
- CN220138617U CN220138617U CN202321501762.0U CN202321501762U CN220138617U CN 220138617 U CN220138617 U CN 220138617U CN 202321501762 U CN202321501762 U CN 202321501762U CN 220138617 U CN220138617 U CN 220138617U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- welding
- fixed
- pole
- lithium battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 20
- 238000003466 welding Methods 0.000 claims abstract description 50
- 229920003023 plastic Polymers 0.000 claims abstract description 36
- 239000004033 plastic Substances 0.000 claims abstract description 36
- 238000003825 pressing Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 101100460844 Mus musculus Nr2f6 gene Proteins 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a lithium battery pole piece connecting structure which comprises two pole pieces and a top cover, wherein positive and negative pole lugs are arranged on one sides of the two pole pieces, the pole lugs are obtained by pole piece die cutting, a plastic piece is fixed on the back of the top cover, a groove is formed in one side, far away from the top cover, of the plastic piece, and positive and negative welding pieces for welding the pole lugs are fixed on two sides of the plastic piece in an embedded mode. According to the utility model, the pole piece, the pole lug, the top cover, the plastic piece, the pressing frame and the clamping structure are arranged, when the pole lug of the pole piece is required to be welded on the top cover of the battery, the pole lug and the welding piece on the back surface of the top cover can be firstly attached and placed, then the pressing frame is placed in the plastic piece and fixed to the pressing frame through the clamping structure, at the moment, the pole lug of the pole piece is pressed and attached on the welding piece, and when the pole lug is welded through the ultrasonic welding machine, the virtual welding is not easy to occur, the welding area can be ensured, and the welding yield is improved.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a lithium battery pole piece connecting structure.
Background
The lithium battery has high charging efficiency and short charging time. With the progress of technology, the rapid charging capability of lithium batteries is becoming stronger, and charging with a larger capacity can be achieved in a short time. The battery pole piece of the lithium battery consists of two parts: the positive plate and the negative plate are respectively positioned at two ends of the battery and are separated by electrolyte. The positive and negative plates may be connected to positive and negative terminals of the battery through tabs, enabling current to flow between the battery and an external circuit. Thus, the battery can supply power to the outside or receive charge from an external power source.
The post-process production step of the lithium battery comprises a welding process of the electrode lugs of the battery pole piece, wherein the electrode lugs of the positive and negative pole pieces are welded on copper and aluminum welding sheets on the back surface of the battery top cover through an ultrasonic welding machine. Before welding, the pole piece and the top cover are manually placed in the jig, so that the pole lugs can be attached to copper and aluminum welding pieces on the back surface of the battery top cover, then the jig is placed below a welding head of an ultrasonic welding machine, and the pole lugs are welded to the copper and aluminum welding pieces through ultrasonic waves.
At present, when in actual welding, a problem occurs in the welding process, and as the tab of the pole piece is exposed and made of copper and aluminum, the tab of the pole piece is attached to the surface of the copper and aluminum welding tab and then is tilted easily, so that when the welding is performed, the virtual welding is easy to occur or the welding area is insufficient, the welding is one of key steps for connecting the tab with the battery pole piece, and if the welding area is insufficient or not firm enough, the current passing of a subsequent finished battery can be influenced. Specific reasons for its influence on the current are: insufficient welding area can increase the contact resistance between the electrode and the tab; the tab may loosen or break, resulting in an interruption of the connection between the electrode and the tab; if the welding area is too small, damage to the electrode or tab may result.
Therefore, the utility model provides a lithium battery pole piece connecting structure.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a lithium battery pole piece connecting structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a lithium battery pole piece connection structure, includes two pole pieces and top cap, two one side of pole piece all is equipped with positive and negative two utmost point ears, and the utmost point ear is by pole piece cross cutting, the top cap back is fixed with the working of plastics, and the working of plastics is kept away from top cap one side and is the recess design, the working of plastics both sides are fixed with the positive and negative welding piece that is used for welding the utmost point ear through embedded mode, the inside frame that presses that is used for compressing tightly the utmost point ear that is equipped with of recess of working of plastics, press the laminating of frame lateral wall and working of plastics's recess inner wall, the recess both sides of working of plastics all are equipped with the chucking structure that is used for fixed frame that presses.
Further, the positive and negative welding pieces are electrically connected with two positive and negative poles on the front face of the top cover. So that the positive and negative welding sheets can be connected and conducted with the positive and negative poles on the top cover.
Further, an explosion-proof valve and a liquid injection hole are arranged in the middle of the top cover. Electrolyte can be injected into the battery through the liquid injection hole, and the explosion-proof valve can prevent the explosion caused by overlarge pressure in the battery, thereby playing an explosion-proof role.
Furthermore, the four corners of the plastic part groove are respectively fixed with a positioning rod, and the four corners of the pressing frame are respectively provided with a positioning hole for inserting the positioning rods. When the pressing frame is placed in the groove of the plastic part, the positioning rod and the positioning hole can play a role in positioning.
Further, the chucking structure is including being fixed in the fixing base on the working of plastics, the spout has been seted up on the fixing base surface, the inside sliding connection of spout has the slider, slider and the common fixedly connected with spring of spout inner wall, the slider top is fixed with the latch, and latch joint is in pressing the frame surface. The sliding block can be pushed to move through the elasticity of the spring, the sliding block drives the latch to be clamped on the surface of the pressing frame, and the pressing frame is fixed.
Furthermore, the top end of the latch is designed to be inclined at one side close to the pressing frame, and a convex rib is fixed on the upper surface of the latch. The latch is designed into an inclined plane form, so that the pressing frame can extrude the latch, and the latch retreats along the sliding groove, thereby being beneficial to installation of the pressing frame.
Further, a guide rod is fixed in the chute, and the guide rod penetrates through the sliding block and is in sliding connection with the sliding block. The guide rod can play a guiding role on the sliding block and can prevent the sliding block from being separated from the sliding groove.
The utility model has the beneficial effects that:
when the electrode tab is needed to be welded to the top cover of the battery, the electrode tab and the welding sheet on the back surface of the top cover can be attached and placed firstly, then the pressing frame is placed in the plastic part and fixed to the pressing frame through the clamping structure, the electrode tab of the electrode tab is pressed and attached to the welding sheet, and then virtual welding is not easy to occur when the electrode tab is welded through an ultrasonic welding machine, so that the welding area can be ensured, and the welding yield can be improved; thereby ensuring that the welding area is large enough and the welding quality is good, and further ensuring the current passing effect of the subsequent finished battery.
Drawings
FIG. 1 is a top view of the present utility model;
FIG. 2 is a partial perspective view of the present utility model;
fig. 3 is an enlarged view at a in fig. 1.
Legend description:
1. a pole piece; 2. a tab; 3. a top cover; 4. a plastic member; 5. welding the tab; 6. pressing a frame; 7. a clamping structure; 71. a fixing seat; 72. a chute; 73. a slide block; 74. latch teeth; 75. a rib; 76. a guide rod; 77. a spring; 8. an explosion-proof valve; 9. a liquid injection hole; 10. a positioning rod; 11. and positioning holes.
Detailed Description
As shown in fig. 1-3, relate to a lithium battery pole piece connection structure, including two pole pieces 1 and top cap 3, one side of two pole pieces 1 all is equipped with positive and negative two utmost point ears 2, and utmost point ear 2 is by pole piece 1 cross cutting, the top cap 3 back is fixed with working of plastics 4, and working of plastics 4 is kept away from top cap 3 one side and is the recess design, working of plastics 4 both sides are fixed with the positive and negative welding piece 5 that is used for welding utmost point ear 2 through embedded mode, the inside frame 6 that is equipped with of recess that is used for compressing tightly utmost point ear 2 of working of plastics 4, frame 6 lateral wall and the laminating of the recess inner wall of working of plastics 4, the recess both sides of working of plastics 4 all are equipped with the chucking structure 7 that are used for fixed frame 6 that presses.
As shown in fig. 1, the positive and negative welding pieces 5 are electrically connected with two positive and negative posts on the front surface of the top cover 3. The middle part of the top cover 3 is provided with an explosion-proof valve 8 and a liquid injection hole 9. The structure is identical to that of the existing battery top cover 3, the liquid injection hole 9 is used for injecting electrolyte, and the explosion-proof valve 8 can play a role in preventing explosion of the battery.
As shown in fig. 1 and 3, the four corners of the groove of the plastic part 4 are respectively fixed with a positioning rod 10, and the four corners of the pressing frame 6 are respectively provided with a positioning hole 11 for inserting the positioning rod 10. When the press frame 6 is installed in the groove of the plastic part 4, the positioning rod 10 and the positioning hole 11 can play a role of positioning the press frame 6.
As shown in fig. 1 and 2, the clamping structure 7 includes a fixed seat 71 fixed on the plastic part 4, a sliding groove 72 is formed on the surface of the fixed seat 71, a sliding block 73 is slidably connected inside the sliding groove 72, a spring 77 is fixedly connected with the inner wall of the sliding block 73 and the inner wall of the sliding groove 72 together, a latch 74 is fixed at the top end of the sliding block 73, and the latch 74 is clamped on the surface of the pressing frame 6. Under the action of the elastic force of the spring 77, the sliding block 73 can be pushed to move to the side of the pressing frame 6, so that the clamping teeth 74 can be clamped on the surface of the pressing frame 6, the pressing frame 6 is fixed, and the pressing frame 6 can press the lugs 2 of the pole piece 1 on the surface of the welding piece 5, thereby being beneficial to subsequent welding.
The top end of the latch 74 and one side close to the pressure frame 6 are designed to be inclined planes, a convex rib 75 is fixed on the upper surface of the latch 74, and the latch 74 can be pulled to be separated from the pressure frame 6 by pulling the convex rib 75, so that the pressure frame 6 can be conveniently disassembled. The guide rod 76 is fixed inside the chute 72, and the guide rod 76 penetrates through the slider 73 and is in sliding connection with the slider 73. The guide rod 76 can play a role in limiting the sliding block 73, and the sliding block 73 is prevented from being separated from the sliding groove 72.
When in use, the utility model is characterized in that: the pole piece 1 and the top cover 3 are placed on a welding jig, the pole lug 2 of the pole piece 1 is attached to the surface of the welding piece 5, the pressing frame 6 is placed in a groove of the plastic piece 4, the clamping teeth 74 of the clamping structures 7 on two sides of the plastic piece 4 are used for clamping the pressing frame 6 to fix the pressing frame 6, the pressing frame 6 can tightly press the pole lug 2 on the surface of the welding piece 5, tilting of the pole lug 2 during welding is avoided, after welding is completed, the clamping teeth 74 are separated from the pressing frame 6 through the protruding edges 75, and the pressing frame 6 can be detached for the next welding.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (7)
1. A lithium battery pole piece connection structure, its characterized in that: including two pole pieces (1) and top cap (3), two one side of pole piece (1) all is equipped with positive and negative two utmost point ear (2), and utmost point ear (2) are by pole piece (1) cross cutting, top cap (3) back is fixed with working of plastics (4), and working of plastics (4) are kept away from top cap (3) one side and are the recess design, working of plastics (4) both sides are fixed with positive and negative welding piece (5) that are used for welding utmost point ear (2) through embedded mode, the inside frame (6) that are used for compressing tightly of the recess of working of plastics (4) that are equipped with of working of plastics (4), the recess inner wall laminating of frame (6) lateral wall and working of plastics (4), the recess both sides of working of plastics (4) all are equipped with chucking structure (7) that are used for fixed frame (6).
2. The lithium battery pole piece connecting structure according to claim 1, wherein: the positive and negative welding pieces (5) are electrically connected with two positive and negative poles on the front face of the top cover (3).
3. The lithium battery pole piece connecting structure according to claim 1, wherein: an explosion-proof valve (8) and a liquid injection hole (9) are arranged in the middle of the top cover (3).
4. The lithium battery pole piece connecting structure according to claim 1, wherein: positioning rods (10) are fixed at four corners of the groove of the plastic part (4), and positioning holes (11) for inserting the positioning rods (10) are formed at four corners of the pressing frame (6).
5. The lithium battery pole piece connecting structure according to claim 1, wherein: the clamping structure (7) comprises a fixed seat (71) fixed on a plastic part (4), a sliding groove (72) is formed in the surface of the fixed seat (71), a sliding block (73) is connected inside the sliding groove (72) in a sliding mode, a spring (77) is fixedly connected with the inner wall of the sliding groove (72) jointly, a latch (74) is fixed at the top end of the sliding block (73), and the latch (74) is clamped on the surface of the pressing frame (6).
6. The lithium battery pole piece connecting structure according to claim 5, wherein: the top end of the latch (74) and one side close to the pressing frame (6) are designed to be inclined planes, and a convex rib (75) is fixed on the upper surface of the latch (74).
7. The lithium battery pole piece connecting structure according to claim 5, wherein: the inside of the chute (72) is fixed with a guide rod (76), and the guide rod (76) penetrates through the sliding block (73) and is in sliding connection with the sliding block (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321501762.0U CN220138617U (en) | 2023-06-13 | 2023-06-13 | Lithium battery pole piece connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321501762.0U CN220138617U (en) | 2023-06-13 | 2023-06-13 | Lithium battery pole piece connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220138617U true CN220138617U (en) | 2023-12-05 |
Family
ID=88959111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321501762.0U Active CN220138617U (en) | 2023-06-13 | 2023-06-13 | Lithium battery pole piece connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220138617U (en) |
-
2023
- 2023-06-13 CN CN202321501762.0U patent/CN220138617U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |